Leptoglossus occidentalis (Heidemann, 1910) —Western Conifer Seed Bug (Fig. 4) Distribution in Turkey (Map 4): Adana, Afyonkarahisar, Amasya, Ankara, Ardahan, Artvin, Balıkesir, Bilecik, Burdur, Bursa, Edirne, Elazığ, Erzurum, Isparta, İstanbul, İzmir, Kastamonu, Kırklareli, Muğla, Yalova (Arslangündoğdu & Hızal 2010; Fent & Kment 2011; Hızal & İnan 2012; Yıldırım et al. 2013; Çerçi & Koçak 2016; Dursun 2016; Özek & Avcı 2017; Parlak 2017; Aksu 2018; Oğuzoğlu & Avcı 2018; Selek 2018; Özgen et al. 2017; İpekdal et al. 2019; Zengin & Dursun 2019; Oğuzoğlu & Avcı 2020); Antalya, Bartın, Bolu, Çorum, Denizli, Düzce, Eskişehir, Giresun, Karabük, Kayseri, Kütahya, Ordu, Osmaniye, Sakarya, Samsun, Tokat, Sinop, Tekirdağ, Uşak, Zonguldak (this study). New records by citizen scientists in Turkey: 1. Afyonkarahisar (centre): Sahipata, 12.VIII.2020 (GBIF.org 2021). 2. Ankara: Çamlıdere, Şahinler Nature Park, 24.X.2020 (Zengin 2020); 3. Çankaya, 28.IX.2017 (Yetgin 2017); 4. Çankaya, 17.X.2020 (Dilek 2020); 5. Çankaya, 24.IX.2020 (GBIF.org 2021); 6. Çankaya, Aziziye, 9.X.2020 (GBIF.org 2021); 7. Çankaya, Dikmen Vadisi, 28.VIII.2019 (Usta 2019); 8. Çankaya, İncek, near Prestij, 4.IX.2020 (GBIF.org 2021); 9. Çankaya, Ümitköy, 14.X.2018 (Deniz 2018); 10. Etimesgut, Yavuz Selim, 30.VIII.2020 (Çimen 2020a); 11. Gölbaşı, 11.X.2020 (GBIF.org 2021); 12. Gölbaşı, İncek, 8.III.2021 (Güler 2021); 13. Gölbaşı, Yavuz Sultan Selim, 20.IV.2021 (Kipritoğlu 2021); 14. Kızılcahamam, Karacaören, 25.X.2020 (GBIF. org 2021); 15. Yaşamkent, Yenimahalle, 3.I.2021 (Köseoğlu 2021); 16. Yenimahalle, 4.X.2019 (GBIF.org 2021); 17. Yenimahalle, Mutlukent, 24.IX.2020 (Aversano 2020). 18. Antalya: Alanya, 25.II.2021 (GBIF.org 2021); 19. Manavgat, 12.VI.2014 (Şahin 2014); 20. Serik, Belek, 8.X.2020 (Klimchak 2020). 21. Balıkesir: cf. “Sındırgı”, 8.X.2018 (GBIF.org 2021). 22. Bartın (centre), 22.X.2020 (Amaç 2020a). 23. Bolu: Mudurnu, Taşkesti, 27.XI.2020 (Nihan 2020). 24. Bursa: Gemlik, 20.X.2020 (GBIF.org 2021); 25. İznik, 4.X.2015 (Sancar 2015d); 26. Nilüfer, Ürünlü, 30.XI.2017, 23.X.2018 (Biçici 2017; 2018b); 27. Osmangazi, 29.IX.2018 (Biçici 2018c); 28. Yıldırım, 22.X.2015 (Yıldırım 2015). 29. Çorum (centre), 15.VIII.2015 (Deniz 2015); 30. ibid., 13.VII.2018 (Çimen 2018). 31. Denizli: Merkezefendi, 29.XI.2020 (Karaca 2020a); 32. ibid., 25.X.2020 (Özcan 2020); 33. Pamukkale, 13.X.2020 (Karaca 2020b). 34. Düzce (centre), 12.X.2018 (Öztürk 2018). 35. Eskişehir (centre): Çankaya, 11.XI.2020 (GBIF.org 2021); 36. Muttalip Quarter, 14.X.2018 (GBIF.org 2021); 37. Odunpazarı, 23.IX.2018 (GBIF. org 2021); 38. Odunpazarı Cemetery, 8.IV.2021 (Suna 2021b). 39. Giresun: Espiye, 8.X.2020 (GBIF.org 2021). 40. İstanbul: Kartal, 5.X.2020 (GBIF.org 2021); 41. Ataşehir, Barbaros, 1.X.2020 (Ovich 2020); 42. Sarıyer, 27.X.2020 (Ozgurek 2020); 43. Bakırköy, 29.X.2019 (Arakaky 2019); 44. Bakırköy, Kartaltepe, 25.V.2020 (Sxhmxt 2020); 45. Başakşehir, 10.X.2015 (Uçar 2015b); 46. Esenyurt, 25.I.2015 (Çerçi 2015); 47. Kadıköy, 2.X.2019 (Burnaz 2019); 48. Kadıköy, 28.X.2018 (Sipahioğlu 2018); 49. Kadıköy, Bostancı, 10.XI.202 (Öztürk 2020); 50. Maltepe, Altayçeşme, 28.IX.2019 (Birol 2019); 51. Kartal, 25.X.2020 (GBIF.org 2021); 52. Pendik, Yenişehir, 23.X.2020 (Caferoğlu 2020); 53. Sancaktepe, Çekmeköy, 4.X.2020 (GBIF.org 2021); 54. Sarıyer, 4.II.2021 (GBIF.org 2021); 55. Sarıyer, Hacıosman, 3.II.2021: (Doğa 2021); 56. Sarıyer, Bahçeköy, 29.XI.2020 (Alkan 2020); 57. Sarıyer, road to Koç University, 4.IX.2020 (GBIF.org 2021); 58. Silivri, 13.VIII.2019 (GBIF.org 2021); 59. Ümraniye, 9.XI.2020 (GBIF.org 2021). 60. İzmir: Selçuk, 23.X.2020 (Oruz 2020c); 61. Urla, 19.VII.2018, 18.X.2020 (Çerçi 2018; GBIF.org 2021). 62. Karabük (centre), 10.X.2020 (Oral 2020); 63. Safranbolu, 29.X.2020 (GBIF.org 2021). 64. Kastamonu (centre), 6.XI.2018 (Edebiibey 2018); 65. Araç, 9.XI.2014, 8.I.2016 (Tosun 2015; 2016a). 66. Kayseri: Yahyalı, 19.XI.2014, 23.XI.2015, 23.X.2018 (Şahin 2014; 2015; 2018). 67. Kütahya (centre), 17.X.2020 (Onur 2020); 68. Tavşanlı, 17.X.2018 (GBIF.org 2021). 69. Muğla: Menteşe, 9.V.2021 (Dmkurysh 2021). 70. Ordu (centre), 11.XI.2020 (Şenocak 2020). 71. Osmaniye (centre), 1.XI.2020 (Arıkan 2020). 72. Sakarya: Adapazarı, Taşkısığı, 22.X.2019 (Efe 2019). 73. Samsun: Atakum, Kurupelit, 01.X.2014, 03.III.2018 (Eren 2014; 2018); 74. İlkadım, 24.X.2020 (Coşkun 2020b); 75. İlkadım, Bahçelievler, 21.X.2020 (Kaan 2020). 76. Sinop (centre): Ada, 6.X.2020 (Coşkun 2020c). 77. Tekirdağ: Süleymanpaşa, 21.X.2020 (GBIF.org 2021). 78. Tokat (centre), 12.I.2015 (Tilki 2015). 79. Uşak (centre), 26.X.2020 (AA 2020). 80. Yalova: Armutlu, 19.XI.2010 (Verün 2018). 81. Zonguldak: Çaycuma, 27.III.2016 (Yangın 2016a). Comments: Native distribution of L. occidentalis is in North America (Rabitsch 2008). Its first European record was given in Italy in 1999. The distribution of this bug rapidly expanded to eastern and western Europe from Italy and now it is very common and widespread throughout the continent, and known from Albania, Algeria, Austria, Belgium, Bulgaria, China, Croatia, Crete, Czech Republic, Denmark, France, Finland, Georgia, Germany, Great Britain, Greece, Hungary, Ireland, Italy, Japan, Kazakhstan, Kosovo, Lebanon, Luxembourg, Macedonia, Malta, Moldavia, Montenegro, Morocco, Netherlands, Norway, Palestine, Poland, Portugal, Romania, Russia, Serbia, Slovakia, Slovenia, Spain, Switzerland, Syria, Tunisia, Turkey, and Ukraine, as well as Central and South America and South Africa (Arslangündoğdu & Hızal 2010; Fent & Kment 2011; Aukema 2021). It reached Turkey a decade later following its first record in Europe and reported from the European side of İstanbul province in 2009 (Arslangündoğdu & Hızal 2010). It was observed from Edirne (Fent & Kment 2011) and Yalova (this study) in the same year. It spread toward southwestern Turkey over Balıkesir in 2011 (Dursun 2016) and İzmir in 2012 (Hızal & İnan 2012) and arrived to Antalya in 2014 (this study). According to new data, it was also seen in Samsun in 2014, in Çorum and Tokat in 2015. Its occurrence in the surrounding provinces in the following years is probably due to the lack of observation. According to 89 records given from 81 localities in the present study, it is seen all year except December. With 43 records, almost half of the total was obtained in October (Graph 4). GRAPH 4. Seasonality of Leptoglossus occidentalis (Heidemann, 1910), based on records from Turkey., Published as part of Çerçi, Bariş, Karataş, Ahmet & Karataş, Ayşegül, 2021, Insecta non gratae: New Distribution Records of Eight Alien Bug (Hemiptera) Species in Turkey with Contributions of Citizen Science, pp. 1-28 in Zootaxa 5057 (1) on pages 8-10, DOI: 10.11646/zootaxa.5057.1.1, http://zenodo.org/record/5585486, {"references":["Arslangundogdu, A. & Hizal, E. (2010) The western conifer seed bug, Leptoglossus occidentalis (Heidemann, 1910), recorded in Turkey (Heteroptera: Coreidae). Zoology in the Middle East, 50, 138 - 139. https: // doi. org / 10.1080 / 09397140.2010.10638426","Fent, M. & Kment, P. (2011) First record of the invasive western conifer seed bug Leptoglossus occidentalis (Heteroptera: Coreidae) in Turkey. North-Western Journal of Zoology, 7 (1), 72 - 80.","Hizal, E. & Inan, M. (2012) Leptoglossus occidentalis (Heidemann, 1910) is an invasive insect species. 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